No. They have to shut down 5 players because the spurs offense works because all 5 players on the court are a threat and contribute. Yes it relies on kawhis creative ability but he doesn't need to be scoring for the spurs offense to be effective.

Butler also doesn't fit the team. We shoot a LOT of threes and he doesn't. Either he'd have to be heaving up a lot of misses or Brad is going to have to change up the offense significantly...I don't really like either of those ideas.